Visqueen Low Permeability Gas Membrane 4m x 12.5 (50m²)

Used as a high performance radon membrane and/or damp proof membrane positioned within the ground floor construction either above or below the structural floor slab.

Benefits

• Centre folded so limits creases and reduces the risk of cracks in screed.
• Flexible, making it easier to install
• BBA certified
• Complies with NHBC Foundation’s NF94 guidance for use in Type A and Type B membrane locations in reinforced cast in situ suspended floor slabs and rafts
• Complies with NHBC Amber 1 - suitable for low gas risk NHBC housing sites
• Lap joints can be taped or heat welded  
• Acts as a radon and damp proof membrane 
• Large coverage of 50m²

 

Good to know

• Should be installed on a smooth continuous substrate free from irregularities such as voids or irregularities
• Membrane should be clean & dry at the time of jointing.
• Should overlapped by at least 150mm, bonded with Visqueen pro double sided jointing tape and sealed with Visqueen foil lap tape.
• Airtight seals should be formed around all service entry points
• If the membrane is punctured or perforated a patch of the same material should be lapped at least 150mm beyond the limits of the puncture and either heat welded or bonded with Visqueen Pro Double Sided Jointing Tape and sealed with Visqueen Foil Lap Tape
• Long periods of exposure to ultraviolet light will reduce the effectiveness of the membrane. The membrane should be covered by a protective layer immediately after installation to prevent damage.
• A minimum thickness of 50mm screed is recommended.
• Do not install in temps below 5°C